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J. Clin. Microbiol. doi:10.1128/JCM.00808-07
Copyright (c) 2007, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

Three new Sporothrix species of clinical interest: S. brasiliensis, S. globosa and S. mexicana

Unitat de Microbiologia, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Spain; Department of Pathology, University of Texas Health Science Center, San Antonio, TX, USA; Department of Dermatology, Kanazawa Medical University, Ishikawa, Japan

^* To whom correspondence should be addressed. Email: josepa.gene{at}urv.cat.

	Abstract

Sporothrix schenckii is the species responsible for sporotrichosis, a fungal infection caused by the traumatic implantation of this dimorphic fungus. Recent molecular studies have demonstrated that this species constitutes a complex of numerous phylogenetic species. Since the delineation of such species could be of extreme importance from a clinical point of view, we have studied a total of 127 isolates, most of which were received as S. schenckii, including the available type strains of species currently considered synonyms, and also some close morphological species. We have phenotypically characterized all these isolates, using different culture media, growth rates at different temperatures, and numerous nutritional tests, and compared their calmodulin gene sequences. The molecular analysis revealed that S. albicans, S. inflata and S. schenckii var. luriei are species clearly different from S. schenckii. The combination of these phenetic and genetic approaches allowed us to propose the new species Sporothrix brasiliensis, S. globosa and S. mexicana. The key phenotypic features for recognizing these species are the morphology of the sessile pigmented conidia, the growth at 30, 35 and 37°C and the assimilation of sucrose, raffinose and ribitol.

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